The OzOat diversity panel is a curated collection of ~319 oat accessions representing global genetic diversity and the breeding history of Australian oats. It spans material from historical landraces (circa 1892) to modern cultivars, including key international introductions and donor lines. Designed to maximise recombination and capture phenotypic diversity, the panel underpins gene discovery and marker development for any trait of interest. Genotyped with high-density SNP and transcriptome data, the OzOat panel provides a powerful genome-to-phenome platform for accelerating genetic discovery and breeding innovation, enabling the development of oat varieties with improved resilience, productivity, and quality tailored to Australian farming systems.